Language and Ageing in Adults With Down Syndrome: An Analysis of Receptive and Expressive Language Measures.
Mario Figueroa, Sònia Darbra
PMID 39647848WHAT IT FOUND
Receptive language declines in adults with Down syndrome aged 40-50, but expressive language remains stable.
This suggests clinicians should monitor comprehension and vocabulary in this age group, rather than assuming expressive skills will deteriorate first.
Key findings
01Age significantly predicted receptive vocabulary and language comprehension scores, with models accounting for 28% and 31% of the variance respectively.
02Expressive language measures, including mean length of utterance and lexical diversity, showed no significant decline with age.
03Receptive language measures showed moderate agreement with specific expressive measures like mean length of utterance, suggesting they may serve as indicators of general language proficiency.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study used a cross-sectional design with a small sample size (45 participants), which limits the ability to detect subtle changes and increases the risk of cohort effects. Participants were recruited from centres in Spain and were all engaged in educational or occupational activities, which may not represent the broader population of adults with Down syndrome. Hearing loss and auditory processing difficulties, which are common in adults with Down syndrome, were not assessed and could have influenced receptive language scores. The study excluded individuals with diagnosed dementia, meaning the results may not apply to those in preclinical or prodromal stages of the disease. Information on early intervention history was limited, with only seven participants having received it, making it difficult to account for its potential long-term effects on language skills.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not assume that expressive language skills will decline in parallel with receptive language in adults with Down syndrome. The study found that while comprehension and vocabulary scores decreased in the 40-50 age range, expressive measures such as sentence length and word variety remained stable. Focusing assessment solely on expressive output may miss early signs of age-related language change.